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WO1996017710A1 - Method and device for regrinding grooved tools - Google Patents

Method and device for regrinding grooved tools Download PDF

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Publication number
WO1996017710A1
WO1996017710A1 PCT/EP1995/004304 EP9504304W WO9617710A1 WO 1996017710 A1 WO1996017710 A1 WO 1996017710A1 EP 9504304 W EP9504304 W EP 9504304W WO 9617710 A1 WO9617710 A1 WO 9617710A1
Authority
WO
WIPO (PCT)
Prior art keywords
positioning head
stylus
groove
regrinding
grinding wheel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP1995/004304
Other languages
German (de)
French (fr)
Inventor
Erwin Junker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to PL95320216A priority Critical patent/PL179007B1/en
Priority to SK700-97A priority patent/SK70097A3/en
Priority to US08/836,517 priority patent/US5807164A/en
Priority to DE59507853T priority patent/DE59507853D1/en
Priority to BR9509957A priority patent/BR9509957A/en
Priority to JP8517277A priority patent/JPH10509658A/en
Priority to EP95936584A priority patent/EP0796164B1/en
Priority to CZ19971712A priority patent/CZ287465B6/en
Priority to SI9530379T priority patent/SI0796164T1/en
Application filed by Individual filed Critical Individual
Publication of WO1996017710A1 publication Critical patent/WO1996017710A1/en
Priority to BG101510A priority patent/BG62437B1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/22—Equipment for exact control of the position of the grinding tool or work at the start of the grinding operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q16/00—Equipment for precise positioning of tool or work into particular locations not otherwise provided for
    • B23Q16/001—Stops, cams, or holders therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/02—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of milling cutters
    • B24B3/024—Indexing equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/24—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills
    • B24B3/26—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills of the point of twist drills
    • B24B3/28—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills of the point of twist drills by swivelling the drill around an axis angularly to the drill axis
    • B24B3/30—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills of the point of twist drills by swivelling the drill around an axis angularly to the drill axis and rotating the drill about its own axis

Definitions

  • the invention relates to a method and a device for regrinding straight and spiral grooved tools with the aid of a positioning head which is provided with a stylus which engages in a groove and which is arranged in the feed direction in front of the grinding wheel.
  • regrinding straight and spiral fluted tools there are generally two possibilities: Firstly, a machine with numerical control of the individual axis movements is used. These machines have comparatively high acquisition costs and are well suited for larger quantities, but the exact geometry of the tool to be resharpened must be known or measured before regrinding the grooved tool so that these measured values can be transferred to the control.
  • resharpening grooved tools Another option for resharpening grooved tools is to use a manually controlled resharpening machine that has a low purchase price and is also suitable for small quantities.
  • a manually controlled resharpening machine that has a low purchase price and is also suitable for small quantities.
  • regrinding the spiral-grooved tool for example, it is clamped at its shaft end. This can be done using a chuck, a collet, a mounting cone or another Quill added. The quill is moved manually in the feed direction.
  • the tool geometry in relation to the spiral groove slope does not have to be known because the tool to be reground is positively guided by a stylus. During the grinding process, this engages in a spiral groove of the tool to be reground, the pitch of which corresponds to the slope of the contour to be reground.
  • the grinding tool (grinding wheel) already requires exact guidance by the stylus when it enters the zone to be ground on the tool to be reground, it is arranged in front of the grinding wheel by a certain amount in the feed direction. Due to this advance of the stylus in front of the center of the grinding wheel, the stylus is already in front of the grinding wheel in the outlet area of the spiral groove. As soon as the touch finger leaves the area of the fully formed groove profile, the grinding process must be ended, since otherwise the re-sharpened contour is either distorted or the tool to be re-sharpened and thus becomes unusable. A similar effect then occurs. when the stylus leaves this groove in the case of a groove that runs out into the open. In this known method, the profile to be reground cannot be reground over its entire length on the tool to be reground. A method or a device of the type just described is assumed to be known in the preamble of claim 1 or claim 4.
  • the invention is based on the object of further developing the known method or the known device in a manually controlled regrinding machine in such a way that the regrinding of the profile over its entire length is made possible with the greatest precision.
  • This object is achieved procedurally with the features specified in claim 1, device-wise with the features specified in claim 4. It is crucial that work is carried out with a retractable stylus leading the grinding wheel and with a second stylus running behind the grinding wheel and firmly connected to the positioning head. This is made possible by the fact that the first retractable stylus leads when grinding the beginning of the groove, while subsequently both styli guide at the same time over a certain groove length.
  • the first stylus can be withdrawn, but it must be withdrawn at the latest before entering the groove outlet.
  • the second stylus takes over the guiding of the spindle of the workpiece spindle headstock.
  • the chip face of the groove or the jacket chamfer on the tool to be resharpened can be reground over its entire length.
  • the two styli must be easy to adjust to different tool geometries in a short time.
  • the positioning head with the two styli is attached to a clamp holder which is mounted on the grinding table.
  • the clamp holder is designed in such a way that it can be loosened by hand with a central locking screw, and is fixed again after it has been set. When released, the joints of the clamp holder can move freely so that the positioning head can be adjusted to the desired position. After this adjustment to the desired position, the locking screw is tightened by hand and the joints are now rigid.
  • FIG. 2 shows a side view, partly in section, of the device shown in FIG. 1 perpendicular to the illustration according to FIG. 1
  • FIG. 3 shows the positioning head with the two styli in a partially sectioned front view, the first stylus being shown in the extended position
  • FIG. 4 is an illustration corresponding to FIG. 3 with the stylus retracted
  • a positioning head 1 is provided with two styli 2, 3.
  • the positioning device consists of the positioning head 1, a clamp holder 5 in the form of a freely movable articulated arm, which can be fixed in any position by a locking screw 5A, and a holder 4, with which the clamp holder 5 is fastened on the grinding table 11.
  • the freely movable clamp holder 5 of the positioning device offers the possibility that the positioning head 1 with the two stylus pins 2, 3 can be adjusted very quickly and very precisely to the groove to be scanned on the tool 6 to be reground.
  • the grinding table 11 is provided with guides for longitudinal table movements which are used for adjustment in order to bring the tool to be resharpened into a corresponding longitudinal position.
  • a workpiece headstock is mounted on the grinding table 11, which receives an axially and radially very easily movable quill, which carries out the feed movement during grinding.
  • a collet chuck 7 is attached, which is used to hold the tool 6 to be reground.
  • other clamping elements can also be used for clamping the tool 6 to be reground. This depends on the possibility of receiving the tool 6 to be reground in each case.
  • Regrinding is carried out by means of a grinding wheel 8. Since when the grinding wheel 8 runs into the tool 6 to be reground, it must already be guided radially exactly. the first stylus 2 runs ahead of the grinding wheel 8 by a certain distance, while the second stylus 3 runs after the grinding wheel. The forward travel of the first stylus 2 in front of the grinding wheel 8 is determined by the grinding geometry and tasks. This gives a dimension x.
  • FIG. 2 shows the engagement of the grinding wheel 8 during the regrinding of the rake face 9 of a tool 6.
  • the positioning device with the styli 2 and 3 engages in an adjacent groove 10, the The slope corresponds to the slope of the groove profile to be reground or the casing chamfer.
  • the stylus 2 which leads the grinding wheel 8 is displaceable in a direction parallel to the central axis of the stylus 3.
  • the stylus 3 is firmly connected to the positioning head 1, but is still easy to replace.
  • the two styli 2 and 3 have the same geometry in their head area 12. Depending on the shape of the groove and the grinding task, the design of this head region 12 is designed constructively.
  • the stylus 2 is designed so that it is automatically retractable from the groove. This retraction and extension of the stylus 2 in the positioning head 1 is carried out pneumatically in the example shown, namely by means of the pneumatic connections P1 and P2. Another possibility of moving the stylus 2 is to extend it by means of a compression spring and to pull it back using pneumatics.
  • the retractable stylus 2 is guided in the positioning head 1 in a bore 13 through a rear thicker shaft part 15 without play.
  • the bore 13 is closed by a cover 14 which is screwed to the positioning head 1. This serves as a longitudinal stop when the stylus 2 is extended. When the stylus 2 is pulled back, its rear end strikes the bottom 16 of the bore. 5 and 6 show some machining examples for the engagement of the grinding tool on the tool to be resharpened and for the engagement of the positioning device.
  • spiral fluted tools but also straight fluted tools with the method or with the Device can be resharpened according to the invention.
  • the positioning device described can be attached to any tool grinding machine for regrinding tools. Another possibility for using this method or this device is for regrinding tools with only one groove.
  • the positioning head must then be designed such that a stylus is in front of the grinding wheel and one behind the grinding wheel in the feed direction. It is then necessary to ensure that the two styli are arranged at a point on the groove that is not in the grinding area of the grinding wheel, otherwise the same principle is used as described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Forging (AREA)

Abstract

The invention concerns a method and a device for regrinding straight and helically grooved tools by means of a positioning head which is provided with a feeler pin which engages in a groove and is disposed in front of the grinding disc in the advance direction. In order that the tool can be reground over its entire length, a positioning head with two feeler pins is used. The first feeler pin, which runs in front of the grinding disc, is withdrawn from the groove before the latter tapers off or, if the groove profile remains constant, this feeler pin runs out into the open. The second feeler pin, which is rigidly connected to the positioning head, follows the grinding disc and continues to guide the headstock sleeve when the first feeler pin has left the groove.

Description

Verfahren und Vorrichtung zum Nachschleifen von genuteten Werkzeugen  Method and device for regrinding grooved tools

Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Nachschleifen von gerade- und spiralgenuteten Werkzeugen mit Hilfe eines Positionierkopfes, der mit einem in eine Nut eingreifenden Taststift versehen ist, welcher in Vorschubrichtung vor der Schleifscheibe angeordnet ist. The invention relates to a method and a device for regrinding straight and spiral grooved tools with the aid of a positioning head which is provided with a stylus which engages in a groove and which is arranged in the feed direction in front of the grinding wheel.

Zum Nachschleifen von gerade- und spiralgenuteten Werkzeugen gibt es, wie dem Fachmann allgemein bekannt ist, generell zwei Möglichkeiten: Zum einen wird eine Maschine mit numerischer Steuerung der einzelnen Achsbewegungen eingesetzt. Diese Maschinen haben vergleichsweise hohe Anschaffungskosten und sind für größere Stückzahlen gut geeignet, aber die genaue Geometrie des nachzuschärfenden Werkzeugs muß bekannt sein oder vor dem Nachschleifen des genuteten Werkzeuges vermessen werden, damit diese Meßwerte in die Steuerung übernommen werden können. As is generally known to the person skilled in the art, there are generally two possibilities for regrinding straight and spiral fluted tools: Firstly, a machine with numerical control of the individual axis movements is used. These machines have comparatively high acquisition costs and are well suited for larger quantities, but the exact geometry of the tool to be resharpened must be known or measured before regrinding the grooved tool so that these measured values can be transferred to the control.

Eine weitere Möglichkeit des Nachschärfens von genuteten Werkzeugen besteht darin, eine manuell gesteuerte Nachschärfmaschine zu verwenden, die einen günstigen Anschaffungspreis hat und auch für kleine Stückzahlen geeignet ist. Zum Nachschleifen des z.B. spiralgenuteten Werkzeugs wird dieses an seinem Schaftende eingespannt. Dies kann durch ein Spannfutter, eine Spannzange, einen Aufnahmekonus oder eine andere Pinole aufgenommen. Die Pinole wird manuell in Vorschubrichtung verschoben. Die WZ-Geometrie in bezug auf die Spiralnutsteigung muß dabei nicht bekannt sein, weil eine Zwangsführung des nachzuschleifenden Werkzeugs durch einen Taststift erfolgt. Dieser greift während des Schleifvorgangs in eine Spiralnut des nachzuschleifenden Werkzeugs ein, deren Steigung der Steigung der nachzuschleifenden Kontur entspricht. Da das Schleifwerkzeug (Schleifscheibe) beim Einlaufen in die zu schleifende Zone am nachzuschleifenden Werkzeug bereits eine exakte Führung durch den Taststift erfordert, ist dieser um ein bestimmtes Maß in Vorschubrichtung vor der Schleifscheibe angeordnet. Durch dieses Vorauseilen des Taststiftes vor der Schleifscheibenmitte befindet sich der Taststift schon vor der Schleifscheibe im Auslaufbereich der Spiralnut. Sobald der Tastfinger den Bereich des voll ausgebildeten Nutenprofils verläßt, muß der Schleifvorgang beendet werden, da ansonsten die nachgeschliffene Kontur entweder verzerrt ist oder das nachzuschleifende Werkzeug verschliffen und damit unbrauchbar wird. Ein ähnlicher Effekt tritt dann ein. wenn bei einer ins Freie auslaufenden Nut der Taststift diese Nut verläßt. Bei diesem bekannten Verfahren kann das nachzuschleifende Profil am nachzuschleifenden Werkzeug nicht über seine ganze Länge nachgeschliffen werden. Ein Verfahren bzw. eine Vorrichtung der soeben beschriebenen Art ist im Oberbegriff des Anspruchs 1 bzw. des Anspruchs 4 als bekannt vorausgesetzt. Another option for resharpening grooved tools is to use a manually controlled resharpening machine that has a low purchase price and is also suitable for small quantities. For regrinding the spiral-grooved tool, for example, it is clamped at its shaft end. This can be done using a chuck, a collet, a mounting cone or another Quill added. The quill is moved manually in the feed direction. The tool geometry in relation to the spiral groove slope does not have to be known because the tool to be reground is positively guided by a stylus. During the grinding process, this engages in a spiral groove of the tool to be reground, the pitch of which corresponds to the slope of the contour to be reground. Since the grinding tool (grinding wheel) already requires exact guidance by the stylus when it enters the zone to be ground on the tool to be reground, it is arranged in front of the grinding wheel by a certain amount in the feed direction. Due to this advance of the stylus in front of the center of the grinding wheel, the stylus is already in front of the grinding wheel in the outlet area of the spiral groove. As soon as the touch finger leaves the area of the fully formed groove profile, the grinding process must be ended, since otherwise the re-sharpened contour is either distorted or the tool to be re-sharpened and thus becomes unusable. A similar effect then occurs. when the stylus leaves this groove in the case of a groove that runs out into the open. In this known method, the profile to be reground cannot be reground over its entire length on the tool to be reground. A method or a device of the type just described is assumed to be known in the preamble of claim 1 or claim 4.

Der Erfindung liegt die Aufgabe zu Grunde, bei einer manuell gesteuerten Nachschleifmaschine das bekannte Verfahren bzw. die bekannte Vorrichtung so weiterzubilden, daß das Nachschleifen des nachzuschleifenden Profils über dessen gesamte Länge in größter Präzision ermöglicht wird. Diese Aufgabe wird verfahrensmäßig mit den im Anspruch 1 angegebenen Merkmalen, vorrichtungsmäßig mit den im Anspruch 4 angegebenen Merkmalen gelöst. Entscheidend kommt es darauf an, daß mit einem der Schleifscheibe vorauslaufenden, zurückziehbaren Taststift und mit einem der Schleifscheibe nachlaufenden, fest mit dem Positionierkopf verbundenen zweiten Taststift gearbeitet wird. Dies wird dadurch ermöglicht, daß beim Schleifen des Nutenanfangs der erste zurückziehbare Taststift führt, während anschließend über eine bestimmte Nutenlänge beide Taststifte gleichzeitig führen. Nach Einlauf des zweiten Taststiftes in die Nut am nachzuschleifenden Werkzeug kann der erste Taststift zurückgezogen werden, jedoch muß er spätestens vor dem Eintritt in den Nutenauslauf zurückgezogen sein. Sobald der erste Taststift vor Eintritt in den Nutenauslauf zurückgezogen ist bzw. bei ins Freie auslaufender Nut diese verläßt, übernimmt der zweite Taststift die Führung der Pinole des Werkstückspindelkstocks. Dadurch kann z.B. die Spanbrust der Nut oder die Mantelfase am nachzuschärfenden Werkzeug über seine bzw. ihre ganze Länge nachgeschliffen werden. Die beiden Taststifte müssen sich einfach und in kurzer Zeit auf verschiedene Werkzeuggeometrien einstellen lassen. The invention is based on the object of further developing the known method or the known device in a manually controlled regrinding machine in such a way that the regrinding of the profile over its entire length is made possible with the greatest precision. This object is achieved procedurally with the features specified in claim 1, device-wise with the features specified in claim 4. It is crucial that work is carried out with a retractable stylus leading the grinding wheel and with a second stylus running behind the grinding wheel and firmly connected to the positioning head. This is made possible by the fact that the first retractable stylus leads when grinding the beginning of the groove, while subsequently both styli guide at the same time over a certain groove length. After the second stylus has entered the groove on the tool to be reground, the first stylus can be withdrawn, but it must be withdrawn at the latest before entering the groove outlet. As soon as the first stylus is retracted before entering the slot outlet or leaves it when the slot runs out into the open, the second stylus takes over the guiding of the spindle of the workpiece spindle headstock. As a result, the chip face of the groove or the jacket chamfer on the tool to be resharpened can be reground over its entire length. The two styli must be easy to adjust to different tool geometries in a short time.

Hier sind vor allen Dingen die verschiedenen Nutenformen, Werkzeugabmessungen und Spiralwinkel der Nuten am nachzuschleifenden Werkzeug zu berücksichtigen. Der Positionierkopf mit den beiden Taststiften ist auf einem Klemmhalter befestigt, der auf dem Schleiftisch montiert ist. Um ein möglichst einfaches und schnelles Umrüsten des Positionierkopfes für unterschiedliche Schleifaufgaben zu ermöglichen, ist der Klemmhalter derart ausgeführt, daß er mit einer zentralen Feststellschraube von Hand gelöst werden kann, und nach dem Einstellen durch diese wieder festgestellt wird. Im gelösten Zustand sind die Gelenke des Klemmhalters frei beweglich, so daß der Positionierkopf auf die gewünschte Position einstellbar ist. Nach diesem Einstellen auf die gewünschte Position wird die Feststellschraube von Hand angezogen, und die Gelenke sind nun starr. Above all, the different groove shapes, tool dimensions and spiral angles of the grooves on the tool to be reground must be taken into account. The positioning head with the two styli is attached to a clamp holder which is mounted on the grinding table. In order to enable the positioning head to be converted as simply and quickly as possible for different grinding tasks, the clamp holder is designed in such a way that it can be loosened by hand with a central locking screw, and is fixed again after it has been set. When released, the joints of the clamp holder can move freely so that the positioning head can be adjusted to the desired position. After this adjustment to the desired position, the locking screw is tightened by hand and the joints are now rigid.

Vorteilhafte weitere Ausführungsfoπnen des Verfahrens nach Anspruch 1 sind Gegenstand der Ansprüche 2 und 3, vorteilhafte weitere Ausführungsformen der Vorrichtung nach Anspruch 4 sind Gegenstand der Ansprüche 5 bis 8. Advantageous further embodiments of the method according to claim 1 are the subject of claims 2 and 3, advantageous further embodiments of the device according to claim 4 are the subject of claims 5 to 8.

Im folgenden wird die Erfindung anhand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert. Es zeigt: The invention is explained in more detail below on the basis of exemplary embodiments illustrated in the drawing. It shows:

Fig. 1 schematisch eine erfindungsgemäß ausgebildete Vorrichtung in der Vorderansicht, 1 schematically shows an inventive device in front view,

Fig. 2 eine Seitenansicht, teilweise im Schnitt, der in Fig. 1 dargestellten Vorrichtung senkrecht zur Darstellung gemäß Fig. 1, Fig. 3 den Positionierkopf mit den beiden Taststiften in einer teilweise geschnittenen Vorderansicht, wobei der erste Taststift in ausgefahrener Stellung gezeigt ist, 2 shows a side view, partly in section, of the device shown in FIG. 1 perpendicular to the illustration according to FIG. 1, FIG. 3 shows the positioning head with the two styli in a partially sectioned front view, the first stylus being shown in the extended position,

Fig. 4 eine Darstellung entsprechend der Fig. 3 mit zurückgezogenem Taststift, 4 is an illustration corresponding to FIG. 3 with the stylus retracted,

Fig. 5 und 6 verschiedene Bearbeitungsbeispiele. 5 and 6 different processing examples.

In Fig. 1 ist gezeigt, daß ein Positionierkopf 1 mit zwei Taststiften 2, 3 versehen ist. Die Positioniervorrichtung besteht aus dem Positionierkopf 1, einem Klemmhalter 5 in Form eines frei beweglichen Gelenkarms, der in beliebig eingestellter Position durch eine Feststellschraube 5A festgestellt werden kann, und einem Halter 4, mit welchem der Klemmhalter 5 auf dem Schleiftisch 11 befestigt ist. Der frei bewegliche Klemmhalter 5 der Positioniervorrichtung bietet die Möglichkeit, daß der Positionierkopf 1 mit den beiden Taststiften 2, 3 auf die abzutastende Nut am nachzuschleifenden Werkzeug 6 sehr schnell und sehr genau eingestellt werden kann. Der Schleiftisch 11 ist mit Führungen versehen für Tischlängsbewegungen, die zur Verstellung dienen, um das nachzuschleifende Werkzeug in eine entsprechende Längsposition zu bringen. Ferner ist auf dem Schleiftisch 11 ein Werkstückspindelstock montiert, der eine axial und radial sehr leicht bewegliche Pinole aufnimmt, die die Vorschubbewegung beim Schleifen ausführt. Am vorderen Ende der Pinole ist beispielsweise ein Spannzangenfutter 7 angebracht, welches zur Aufnahme des nachzuschleifenden Werkzeugs 6 dient. Hier können aber auch andere Spannelemente zum Einspannen des nachzuschleifenden Werkzeugs 6 zum Einsatz kommen. Dies hängt von der Aufnahmemöglichkeit des jeweils nachzuschleifenden Werkzeugs 6 ab. Das Nachschleifen erfolgt durch eine Schleifscheibe 8. Da beim Einlauf der Schleifscheibe 8 in das nachzuschleifende Werkzeug 6 dieses bereits radial exakt geführt sein muß. läuft der erste Taststift 2 um einen bestimmten Abstand der Schleifscheibe 8 voraus, während der zweite Taststift 3 der Schleifscheibe nachläuft. Der Vorlauf des ersten Taststifts 2 vor der Schleifscheibe 8 wird durch die Schleifgeometrie und -aufgäbe bestimmt. Hier ergibt sich dann ein Maß x. In Fig. 1 it is shown that a positioning head 1 is provided with two styli 2, 3. The positioning device consists of the positioning head 1, a clamp holder 5 in the form of a freely movable articulated arm, which can be fixed in any position by a locking screw 5A, and a holder 4, with which the clamp holder 5 is fastened on the grinding table 11. The freely movable clamp holder 5 of the positioning device offers the possibility that the positioning head 1 with the two stylus pins 2, 3 can be adjusted very quickly and very precisely to the groove to be scanned on the tool 6 to be reground. The grinding table 11 is provided with guides for longitudinal table movements which are used for adjustment in order to bring the tool to be resharpened into a corresponding longitudinal position. Furthermore, a workpiece headstock is mounted on the grinding table 11, which receives an axially and radially very easily movable quill, which carries out the feed movement during grinding. At the front end of the sleeve, for example, a collet chuck 7 is attached, which is used to hold the tool 6 to be reground. Here, however, other clamping elements can also be used for clamping the tool 6 to be reground. This depends on the possibility of receiving the tool 6 to be reground in each case. Regrinding is carried out by means of a grinding wheel 8. Since when the grinding wheel 8 runs into the tool 6 to be reground, it must already be guided radially exactly. the first stylus 2 runs ahead of the grinding wheel 8 by a certain distance, while the second stylus 3 runs after the grinding wheel. The forward travel of the first stylus 2 in front of the grinding wheel 8 is determined by the grinding geometry and tasks. This gives a dimension x.

In Fig. 2 ist der Eingriff der Schleifscheibe 8 beim Nachschleifen der Spanfläche 9 eines Werkzeuges 6 dargestellt. Die Positioniervorrichtung mit den Taststiften 2 und 3 greift in eine benachbarte Nut 10 ein, deren Steigung der Steigung des nachzuschleifenden Nutenprofils bzw. der Mantelfase entspricht. 2 shows the engagement of the grinding wheel 8 during the regrinding of the rake face 9 of a tool 6. The positioning device with the styli 2 and 3 engages in an adjacent groove 10, the The slope corresponds to the slope of the groove profile to be reground or the casing chamfer.

Aus den Fig. 3 und 4 ist zu ersehen, daß der Taststift 2, welcher der Schleifscheibe 8 vorausläuft, in einer zur Mittelachse des Taststiftes 3 parallelen Richtung verschiebbar ist. Der Taststift 3 ist fest mit dem Positionierkopf 1 verbunden, aber dennoch leicht austauschbar. Die beiden Taststifte 2 und 3 besitzen in ihrem Kopfbereich 12 die gleiche Geometrie. Je nach Nutenform und Schleifaufgabe ist die Gestaltung dieses Kopfbereichs 12 konstruktiv ausgelegt. 3 and 4 it can be seen that the stylus 2, which leads the grinding wheel 8, is displaceable in a direction parallel to the central axis of the stylus 3. The stylus 3 is firmly connected to the positioning head 1, but is still easy to replace. The two styli 2 and 3 have the same geometry in their head area 12. Depending on the shape of the groove and the grinding task, the design of this head region 12 is designed constructively.

Der Taststift 2 ist so ausgeführt, daß er automatisch aus der Nut zurückziehbar ist. Dieses Ein- und Ausfahren des Taststiftes 2 im Positionierkopf 1 wird im gezeigten Beispiel pneumatisch ausgeführt, und zwar mittels der Pneumatikanschlüsse Pl und P2. Eine weitere Möglichkeit der Bewegung des Taststiftes 2 besteht darin, diesen mittels Druckfeder auszufahren und mit Pneumatik zurückzuziehen. Der zurückziehbare Taststift 2 ist im Positionierkopf 1 in einer Bohrung 13 über einen hinteren dickeren Schaftteil 15 spielfrei geführt. Die Bohrung 13 ist durch einen Verschlußdeckel 14 verschlossen, der mit dem Positionierkopf 1 verschraubt ist. Dieser dient als Längsanschlag beim Ausfahren des Taststiftes 2. Beim Zurückziehen schlägt der Taststift 2 mit seinem hinteren Ende am Bohrungsgrund 16 an. In den Fig. 5 und 6 sind einige Bearbeitungsbeispiele für den Angriff des Schleifwerkzeugs an dem nachzuschärfenden Werkzeug und für den Eingriff der Positioniervorrichtung dargestellt. The stylus 2 is designed so that it is automatically retractable from the groove. This retraction and extension of the stylus 2 in the positioning head 1 is carried out pneumatically in the example shown, namely by means of the pneumatic connections P1 and P2. Another possibility of moving the stylus 2 is to extend it by means of a compression spring and to pull it back using pneumatics. The retractable stylus 2 is guided in the positioning head 1 in a bore 13 through a rear thicker shaft part 15 without play. The bore 13 is closed by a cover 14 which is screwed to the positioning head 1. This serves as a longitudinal stop when the stylus 2 is extended. When the stylus 2 is pulled back, its rear end strikes the bottom 16 of the bore. 5 and 6 show some machining examples for the engagement of the grinding tool on the tool to be resharpened and for the engagement of the positioning device.

Es ist darauf hinzuweisen, daß nicht nur spiralgenutete Werkzeuge, sondern auch geradgenutete Werkzeuge mit dem Verfahren bzw. mit der Vorrichtung nach der Erfindung nachgeschärft werden können. Die beschriebene Positioniervorrichtung kann an jeder Werkzeugschleifmaschine zum Nachschleifen von Werkzeugen angebaut werden. Eine weitere Möglichkeit zum Einsatz dieses Verfahrens bzw. dieser Vorrichtung besteht beim Nachschleifen von Werkzeugen mit nur einer Nut. Hier muß der Positionierkopf dann konstruktiv derart ausgeführt sein, daß ein Taststift sich vor der Schleifscheibe und einer sich hinter der Schleifscheibe in Vorschubrichtung befindet. Hier ist dann noch darauf zu achten, daß die beiden Taststifte an einer Stelle der Nut angeordnet werden, die nicht im Schleifbereich der Schleifscheibe liegt, ansonsten wird nach dem gleichen Prinzip verfahren, wie es vorstehend beschrieben worden ist. It should be noted that not only spiral fluted tools, but also straight fluted tools with the method or with the Device can be resharpened according to the invention. The positioning device described can be attached to any tool grinding machine for regrinding tools. Another possibility for using this method or this device is for regrinding tools with only one groove. The positioning head must then be designed such that a stylus is in front of the grinding wheel and one behind the grinding wheel in the feed direction. It is then necessary to ensure that the two styli are arranged at a point on the groove that is not in the grinding area of the grinding wheel, otherwise the same principle is used as described above.

Claims

P a t e n tan s p rü ch e P aten tan sp uch e 1. Verfahren zum Nachschleifen von gerade- und spiralgenuteten zeugen mit Hilfe eines Positionierkopfes, der mit einem in eine eingreifenden Taststift versehen ist, welcher in Vorschubrichtung der Schleifischeibe angeordnet ist, d a du r c h g e k e n n z e i c hn e t , daß ein Positionierkopf (1) mit zwei Taststiftea (2, 3) verwe wird, wobei der erste, der Schleifscheibe (8) vorauslaufende Tast (2) vor dem Eintritt in den Nutenauslauf aus der Nut zurückgezo wird bzw. bei ins Freie auslaufender Nut diese verläßt und zweite, fest mit dem Positionierkopf (1) verbundene Taststift der Schleifscheibe (8) nachläuft und nach dem Entfernen des er Taststifts (2) aus der Nut die Führung der Pinoie des Werkst spindelstocks übernimmt. 1.Procedure for regrinding straight and spiral grooved tools with the aid of a positioning head which is provided with an engaging stylus which is arranged in the feed direction of the grinding wheel, since you rchgekennzeic hn et that a positioning head (1) with two styli ( 2, 3) is used, whereby the first key (2) leading the grinding wheel (8) is pulled out of the groove before entering the groove outlet or leaves the groove when the groove runs out, and the second, firmly with the positioning head (1 ) connected tracer pin runs on the grinding wheel (8) and, after removing the tracer pin (2) from the groove, takes over the control of the pinion of the work headstock. 2. Verfahren nach Anspruch 1. dadurch gekennzeichnet, daß das rückziehen des ersten Taststifts (2) automatisch ersbigt. 2. The method according to claim 1, characterized in that the withdrawal of the first stylus (2) is automatically inherited. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß beiden Taststifte (2, 3) in eine mit der nachzuschleifenden korrespondierende Nut (10) eingreift. 3. The method according to claim 1 or 2, characterized in that the two styli (2, 3) engages in a corresponding with the regrinding groove (10). 4. Vorrichtung zum Durchführen des Verfahrens nach einem der Ansprüche 1 bis 3 mit Hilfe eines Positionierkopfes und eines Taststiftes, dadurch gekennzeichnet, daß der Positionierkopf (1) mit zwei Taststiften (2, 3) ausgestattet ist, wobei der erste Taststift (2) zu- rückziehbar im Positionierkopf (1) gelagert ist und der zweite Taststift (3) mit dem Positionierkopf (1) verbunden ist 4. Device for performing the method according to one of claims 1 to 3 with the aid of a positioning head and a stylus, characterized in that the positioning head (1) is equipped with two styli (2, 3), the first stylus (2) - Retractably mounted in the positioning head (1) and the second stylus (3) is connected to the positioning head (1) 5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der erste Taststift (2) pneumatisch ausfahrbar und zurückziehbar ist. 5. The device according to claim 4, characterized in that the first stylus (2) is pneumatically extendable and retractable. 6. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der erste Taststift (2) mittels Druckfeder ausfahrbar und pneumatisch zurückziehbar ist. 6. The device according to claim 4, characterized in that the first stylus (2) is extendable by means of a compression spring and can be pneumatically retracted. 7. Vorrichtung nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die Taststifte (2, 3) je nach Werkzeuggeometrie austauschbar sind. 7. The device according to claim 5 or 6, characterized in that the feeler pins (2, 3) are interchangeable depending on the tool geometry. 8. Vorrichtung nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, daß der Positionierkopf (1) an einem frei beweglichen Klemmhalter (5) befestigt ist, der nach dem Einstellen des Positionierkopfes (1) in einer bestimmten Position feststellbar ist. 8. Device according to one of claims 4 to 7, characterized in that the positioning head (1) is attached to a freely movable clamp holder (5) which can be determined in a certain position after adjusting the positioning head (1).
PCT/EP1995/004304 1994-12-05 1995-11-02 Method and device for regrinding grooved tools Ceased WO1996017710A1 (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
CZ19971712A CZ287465B6 (en) 1994-12-05 1995-11-02 Method and device for regrinding grooved tools
SK700-97A SK70097A3 (en) 1994-12-05 1995-11-02 Method and device for regrinding grooved tools
US08/836,517 US5807164A (en) 1994-12-05 1995-11-02 Method and device for regrinding grooved tools
DE59507853T DE59507853D1 (en) 1994-12-05 1995-11-02 METHOD AND DEVICE FOR GRINDING SLOTED TOOLS
BR9509957A BR9509957A (en) 1994-12-05 1995-11-02 Process and device for re-grinding grooved tools
PL95320216A PL179007B1 (en) 1994-12-05 1995-11-02 Method of and apparatus for sharpening grooved tools
EP95936584A EP0796164B1 (en) 1994-12-05 1995-11-02 Method and device for regrinding grooved tools
JP8517277A JPH10509658A (en) 1994-12-05 1995-11-02 Method and apparatus for regrinding grooved tools
SI9530379T SI0796164T1 (en) 1994-12-05 1995-11-02 Method and device for regrinding grooved tools
BG101510A BG62437B1 (en) 1994-12-05 1997-05-23 Device for metal dressing tools with chip grooves

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4443213A DE4443213C2 (en) 1994-12-05 1994-12-05 Device for regrinding grooved tools
DEP4443213.5 1994-12-05

Publications (1)

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WO1996017710A1 true WO1996017710A1 (en) 1996-06-13

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US (1) US5807164A (en)
EP (1) EP0796164B1 (en)
JP (1) JPH10509658A (en)
CN (1) CN1168648A (en)
BG (1) BG62437B1 (en)
BR (1) BR9509957A (en)
CZ (1) CZ287465B6 (en)
DE (2) DE4443213C2 (en)
ES (1) ES2144149T3 (en)
PL (1) PL179007B1 (en)
RU (1) RU2155666C2 (en)
SK (1) SK70097A3 (en)
WO (1) WO1996017710A1 (en)

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US6425807B2 (en) * 1999-04-29 2002-07-30 White Hydraulics, Inc. Method and apparatus for grinding rotors for hydraulic motors and apparatus therefor
US6450864B1 (en) 2000-10-13 2002-09-17 Raphael W. Smith End mill grinder with two independently adjustable grinding wheels
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EP0796164B1 (en) 2000-02-23
DE59507853D1 (en) 2000-03-30
CZ171297A3 (en) 1997-12-17
BG62437B1 (en) 1999-11-30
PL320216A1 (en) 1997-09-15
EP0796164A1 (en) 1997-09-24
DE4443213C2 (en) 1996-11-14
BR9509957A (en) 1997-10-14
US5807164A (en) 1998-09-15
RU2155666C2 (en) 2000-09-10
JPH10509658A (en) 1998-09-22
ES2144149T3 (en) 2000-06-01
DE4443213A1 (en) 1996-06-13
BG101510A (en) 1998-01-30
CZ287465B6 (en) 2000-12-13
SK70097A3 (en) 1997-10-08
CN1168648A (en) 1997-12-24
PL179007B1 (en) 2000-07-31

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